12-Letter Words Matching _____S_____C

There are 14 12-letter words that match _____S_____C. 4 are common words, such as ECCLESIASTIC and ENTHUSIASTIC. A rarer one is POSTISCHEMIC. In this set, I is the most frequent open letter (14 words). 2 words contain a doubled letter.

Full list 14

ecclesiasticenthusiasticnarcissisticneurasthenicphotospherictroposphericamphisbaenichydrospherichyperstheniclithosphericmicroseismicnonaestheticplanisphericpostischemic

About this list

Words
14 (4 common words)
Common example
ecclesiastic
Rare example
postischemic
Doubled letters
2
Ending in S
0
Most frequent letter
I (14)

Questions

How many 12-letter words matching _____s_____c are there?

14. 4 of them are common words.

What is a common example?

ECCLESIASTIC is among the common words in this set.